A 3-year-old girl in Houston gained access to a firearm and "unintentionally" shot and killed her 4-year-old sister late Sunday,
Gonzalez said the preliminary investigation showed that the two children had been inside an apartment with five family members and friends and each of the two children's parents believed the other was watching the kids. Instead, they were left unsupervised and picked up an "unsecured" and loaded semi-automatic pistol. https://abcnews.go.com/US/4-year-shot-killed-3-year-houston-sheriff/story?id=97819873